What is rpcss.dll?

Rpcss.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if rpcss.dll is a Windows system file or if it belongs to an application that you can trust.

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Rpcss.dll file information

The process known as Distributed COM Services belongs to software Remote Procedure Call (RPC) (RpcSs) or DCOM Server Process Launcher (DcomLaunch) by Microsoft (

Description: Rpcss.dll is not essential for Windows and will often cause problems. Rpcss.dll is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 401,408 bytes (63% of all occurrences), 399,360 bytes and 6 more variants. 
The service can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. It is a Microsoft signed file. It is not a Windows system file. Therefore the technical security rating is 6% dangerous; however you should also read the user reviews.

Recommended: Identify rpcss.dll related errors

Important: Some malware disguises itself as rpcss.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the rpcss.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Cannot find it on computer but according to SELECTO it is run by a SVCHOST.EXE
  Andre Marcil  
Needed for Windows updates. However, if you are on XP, then after Microsoft ends support for XP on April 8, 2014, go ahead and disable it. The best way to disable it is: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole], "EnableDCOM"="N"
I just ran Norton's Power Eraser and it found this .dll file as bad. I kept hearing the radio adds, etc this morning and couldn't detect where they were coming from. Norton found the bad file and fixed it. I don't hear any voices or adds any more.
  CD Smith Schoen  
16.11.05 in w7 64b, sp1 RpcSs can NOT be disabled through services. It uses a "Network Service" logon and unknown password (Log On tab of rmc-Properties/Log On). In Dependencies tab it list many system components depend on this service. Through rpcss ANY program can ask ANY OTHER program on MY MACHINE to do something for it WITHOUT MY KNOWLEDGE... it has been a constant source of security flaws in UNIX systems as such-and-such RPC service has this unchecked buffer or that improper security check which allows any remote user with the proper script to gain full control of the machine. rpcss.exe is critical to operation of Windows NT. Deleting it will completely disable your system -- or at least severely hamper it.

Summary: Average user rating of rpcss.dll: based on 2 votes with 4 user comments. One user thinks it's probably harmless. One user suspects danger. 2 users don't grade rpcss.dll ("not sure about it").

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Best practices for resolving rpcss issues

A clean and tidy computer is the key requirement for avoiding problems with rpcss. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the rpcss.dll process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

rpcss.dll [all]